Microstructure and Mechanical Property of Mg-Sn-Al Wrought Magnesium Alloys
| Autor: | Wei Rong Li, Yang De Li, Zheng Hua Huang, Nan Zhou, Jing Xu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Mechanical Engineering Metallurgy Alloy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Grain size law.invention Optical microscope Mechanics of Materials law 0103 physical sciences Ultimate tensile strength Dynamic recrystallization engineering General Materials Science Extrusion 0210 nano-technology |
| Zdroj: | Materials Science Forum. 898:97-103 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.898.97 |
| Popis: | The microstructures, phase constitutions and mechanical properties of as-cast samples, extruded rods and plates of Mg-3.52Sn-3.32Al and Mg-6.54Sn-4.78Al alloys were investigated by optical microscopy, scanning electron microscopy, X-ray diffraction and mechanical testing. The results show that as-cast microstructure consists of α-Mg matrix, Mg2Sn and a few dispersed β-Mg17Al12 phases. The two as-cast alloys exhibit good tensile mechanical properties. After hot extrusion, dynamic recrystallization occurs. Average grain size reaches 6 μm ~ 8 μm for rods, and a lot of fine micro-scaled particles exist, resulting in significant enhancement of tensile mechanical properties. The extruded Mg-3.52Sn-3.32Al rod exhibits better comprehensive tensile mechanical property than AZ31B alloy, with tensile strength σb of 295 MPa, yield strength of 200 MPa and elongation of 21.5% at ambient temperature. The extruded Mg-6.54Sn-4.78Al rod exhibits equivalent comprehensive tensile mechanical properties with ZK60 alloy, achieving tensile strength of 355 MPa, yield strength of 275 MPa and elongation of 11% at ambient temperature. The extruded plates at ambient temperature performed a tensile strength of 270 MPa. |
| Databáze: | OpenAIRE |
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